Terry,
----- Original Message ----- From: "Terry Riley" <[EMAIL PROTECTED]>
Newsgroups: mailing.database.myodbc
Sent: Monday, December 06, 2004 8:15 PM
Subject: Locking Issue?
Can someone help, please?
We set up a server to handle a coldfusion web application (CFMX 6.1) running against MySQL 4.1.3b-beta on WinNT.
When it is a little stretched, we are finding many instances of queries listed as either 'Sending...' or 'Copying...' in the processlist, with the time going ever upwards (last check was at 1000 seconds and rising). All the tables in the database concerned are InnoDB, and none of the queries concerned are, as far as I know, involved in any transaction - they are straight selects (albeit complex ones, perhaps).
When this happens, the other requests to the server are inevitably slow, and these seem never to be cleared unless I kill the threads - and I'm not 100% sure how much damage I'm doing in that action.
Is this a possible locking issue? If so, how do I get around it. The settings for the server are at default, except where noted.
This is the my.ini file:
[mysqld]
max_connections=1000
basedir=e:/mysql datadir=e:/mysql/data
wait_timeout=60
# TR added next 6 lines on 27/07/04, after instal of v4.1.3b old-passwords local-infile query_cache_size=25M query_cache_type=1 set-variable=max_allowed_packet=16M set-variable=key_buffer=8M
log-bin= log_slow_queries=
[mysql] local-infile=1
Any pointers as to what I may be doing wrong? Please?
Yes, I know we should upgrade to 4.1.7, and we will - soon.
try tuning InnoDB. Your workload may be seriously disk-bound.
Cheers Terry Riley
Best regards,
Heikki Tuuri
Innobase Oy
Foreign keys, transactions, and row level locking for MySQL
InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up MyISAM tables
http://www.innodb.com/order.php
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